Meta tweaks

.github/funding.yml

@@ -0,0 +1,4 @@
+github: sindresorhus
+open_collective: sindresorhus
+tidelift: npm/gulp-mocha
+custom: https://sindresorhus.com/donate

.github/security.md

@@ -0,0 +1,3 @@
+# Security Policy
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.

index.js

@@ -4,7 +4,7 @@ const execa = require('execa');
 const PluginError = require('plugin-error');
 const supportsColor = require('supports-color');
 const through = require('through2');
-const utils = require('./utils');
+const utils = require('./utils.js');
 
 // Mocha options that can be specified multiple times
 const MULTIPLE_OPTS = new Set([